Process of making indophenol-like condensation products.



nearer vornr, xv ilLca-rnirn's'nn} or t canine N, ensntui PRooiL E-01? tmimomsseaam 'oon'nn vsarroivfrironiic'rs. Q "K No. 895,689. a

To all whom-it may concern:

Be it known that I, WILHELM SCHLENK, doctor of philosophy, chemist, asubject of the King of Bavaria and the German Emperor, residing at 7Romerstrasse, llfunich,

Kin dom ofBavaria German Em nre, have I nically remarkable observation,that quinonechlorimid in. the dry state or in paste form with or withoutthe aid of condensing agents combines witharomatic amins thus formingcolored indophenol-like comlensation-prod The method of obtaining thesecondensation products as described hereunder has the following essentialadvantage over the process applied hitherto: The resulting bodies areobtained directly in a solid dry any increase of the temperature above30 4 agents together vi'ithamins.

'form, showing an almost quantitative yield and are in this formessentially more stable than the indophenols obtained after the knownprocess. i

The method is put in practice by grinding the chlorimids, dry or-in formof pressed cakes, with or without the aid of condensing The condensationtakes place in a short time whereby the temperature of the mixture ismore or less raised. It is preferable to avoid by cooling degreescentigrade] It is advisable to add to these mixture indifferent dilutingagents,

as for instance common salt, Glaubers salt, or infusorialearth. Whencondensing with amins, mineral acids or acid salts are best used ascondensing agents, but organic acids, such as oxalic acid may also beemployed. It is in most cases of no account whether amin is used in formof its salt, for instance chlorhydrate, or whether the acid is onlyadded to the reactionmixture. llhen working after the present processthe condensation-products are ol'itaincd in a very pure form, onlydiluted with'the inorganic salt, and they possess a relatively goodstability. With the aid of sulfid of sodium they are changed intoleuco-compoundsf- It is intended to make use of these products as rawmaterial for sulfurized dyestuffs.

Example 1. 100 parts a-naphthylamin,

Specification of Letters Patent.

' chlorimid present.

Patented Au 11, 1908.

Application filed June 15, 1907. Serial No. 379,151. (Specimens) 400parts common salt are finely powdered and well mixed. Add gradually 100parts of dry quinone-chlorimid (or a corresponding quantity ofmoistpressed cake.) The mixture is then ground (for example in a ball mill)until there is no more unchanged The condensation product thus 0rtained, is a violet black powder, showing a red violet color whendissolved in diluted soda lye, violet blue color when disl solved inalcohol and a violet color with a bluish cast when dissolved inconcentrated sulfuric acid. The process may be probably represented bythe following equation Quinonechlorimid Naphtliylainin L 0,11, N ol-nun, H01 Indophenol Hydrochloric acid Quinonechlorimid v .Toluidinchlo-hydrate o on, a .o,,n, on (a 11, 21101 lndophcnol fiydrocliloric ecu lExample 8. 100 parts quinonechlorimid, 120 parts diphenylamin, 85 partssodium bisulfate, 1000 parts common salt are ground as stated in No. 1.The blue black powder of a greenish cast thus obtained, shows a blueViolet color when dissolved in diluted soda lye, a greenish blue colorwhen dissolved in alcohol, and a deep blue color when dissolved inconcentrated sulfuric acid. The reaction may be probably represented bythe follm ing equation Quinonechlorimid Diphenylamin o on, Nonuann, n01

Indophenol I claim:

1. The process for manufacturing indophenol-hke condensation productswhich con-

